/*
 * Copyright [2013-2021], Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.polardbx.optimizer.ccl.service;

import com.alibaba.polardbx.optimizer.context.ExecutionContext;
import com.alibaba.polardbx.optimizer.ccl.common.CclRuleInfo;

import java.util.List;

/**
 * @author busu
 * date: 2020/11/1 10:20 上午
 */
public interface ICclService {

    String CCL_WAIT_TIMEOUT_MESSAGE_FORMAT =
        "Exceeding the max concurrency %d per node of ccl rule %s after waiting for %d ms";

    boolean begin(final ExecutionContext executionContext);

    void end(final ExecutionContext executionContext);

    void invalidateCclRule(CclRuleInfo cclRuleInfo);

    void clearCache();

    /**
     * @return [ notMatchConnCacheHitCount, notMatchPlanNoParamCacheHitCount, notMatchPlanParamCacheHitCount, notMatchPlanOnlyPwdHitCount ]
     */
    List<Long> getCacheStats();

}
